I have been running Mint on a system with two hard drives. One drive runs Linux and the other runs Win XP. Dual boot worked fine. Re-installed Mint 4.0 over the previous Mint installation using the live CD install. System now boots to Mint, but GRUB does not show existence ofother operating system, which is still there, but can't boot to it. What happened to GRUB dual boot? Should I do another re-install?